![]() ![]() ![]() This means that we can theoretically boot from a device that is encrypted. Newer versions of GRUB do support booting from encrypted block devices (a reference here). Historically it has been necessary to leave /boot unencrypted because bootloaders didn’t support decrypting block devices. That (/boot) is the only partition that should be unencrypted if you want your system to be able to boot. What happens if you format EFI partition?įormatting the EFI partition WILL NOT brick the computer, instead it just won’t be able to boot to anything, requiring a OS (like Windows) to create the EFI partition(Link 1, Link 2) Should the boot partition be encrypted? The interesting thing here is that in the first method, the 100MB partition contains the same files and folders as the 500MB partition in the second method. Windows installs normally and boots normally, without the need for the EFI and MSR partitions. The ESP – EFI System Partiton – should not be confused with /boot (not required for most Ubuntu installations) and is a standard requirement. ![]() ~300MB should be enough for multi-boot but ~550MB is preferable. Yes, a separate EFI partition (FAT32 formated) small partition is always required if using UEFI mode. ![]() The minimum size of this partition is 100 MB, and must be formatted using the FAT32 file format. This partition is usually stored on the primary hard drive. On GPT drives, this is known as the EFI System Partition, or the ESP. However, GRUB2 is (since Jessie) able to unlock LUKS devices with its cryptomount command, which therefore enables encryption of the /boot partition as well: using that feature reduces the amount of plaintext data written to disk. In one word, deleting an EFI partition is risky. Therefore, you cannot see the EFI partition in Windows File Explorer unless you open the Disk Management.
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